div{
    width: 1200px;
    margin: 0 auto;
}
h1{
    margin-top: 30px;
    text-align: center;
}

ul{
    width: 1000px;
    margin: 0 auto;
}
li{
    margin-top: 20px;
    width: 800px;
}
.a1,.a2{
    color: cadetblue;
    text-decoration: none;
    float: right;
}
.a1{
    margin-left: 30px;
}

.add,.center{
    text-decoration: none;
    color: darkturquoise;
    margin-top: 60px;
}
p{
    width: 1200px;
    text-align: right;
}
